266690900 has 144 divisors (see below), whose sum is σ = 712204416. Its totient is φ = 84602880.

The previous prime is 266690863. The next prime is 266690929. The reversal of 266690900 is 9096662.

It is a super-2 number, since 2×266690900² = 142248072285620000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 868547 + ... + 868853.

It is an arithmetic number, because the mean of its divisors is an integer number (4945864).

Almost surely, 2^266690900 is an apocalyptic number.

266690900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266690900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356102208).

266690900 is an abundant number, since it is smaller than the sum of its proper divisors (445513516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266690900 is a wasteful number, since it uses less digits than its factorization.

266690900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 266690900 is about 16330.6735929661. The cubic root of 266690900 is about 643.6790866682.

The spelling of 266690900 in words is "two hundred sixty-six million, six hundred ninety thousand, nine hundred".